Analog Devices Inc./Maxim Integrated MAX702CPA

Overview

MAX702CPA from Maxim Integrated is a +5V power-supply supervisory circuit with factory-trimmed 4.65V reset threshold, debounced manual-reset input (MR), and guaranteed valid RESET output down to VCC = 1V. It delivers a minimum 200ms active-low reset pulse during power-up, power-down, and brownout conditions, and is housed in an 8-pin PDIP package rated for 0°C to +70°C operation. It is used in microprocessor-based systems requiring reliable power-on reset and supply monitoring.

For engineers reviewing the MAX702CPA datasheet, MAX702CPA pinout, MAX702CPA application, or MAX702CPA equivalent, key selection criteria include its fixed 4.65V detection threshold, MR debounce timing, RESET pulse width tolerance (200–500ms), low 100–200µA quiescent current, and compatibility with +5V digital logic interfaces.

Technical Context

The MAX702CPA implements a precision voltage comparator with internal 4.65V reference to monitor VCC directly. Its RESET output remains asserted low until VCC rises above 4.65V and sustains a stable 200ms delay, ensuring µP initialization completes before release. The debounced MR input includes internal 5µA pullup and requires a logic-low pulse ≥100ns to trigger reset.

No external components are needed for basic +5V supervision. Unlike the MAX700/MAX701, the MAX702CPA lacks SENSE, CTL, HYST, and RESET pins - it provides only VCC monitoring and single active-low RESET output, simplifying integration in cost-sensitive embedded control applications.

Key Specifications

Pinout & Package

MAX702CPA is supplied in an 8-pin plastic dual-inline package (PDIP) with 0.3-inch body width and standard through-hole footprint. Pin 1 is marked by a notch or dot; pin numbering follows counter-clockwise convention from top-left when viewed from component side.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power-supply supervisory applications.

Compared with TPS3808G01DBVR and ADM6713ANZ-46ARZ, the MAX702CPA offers lowest BOM cost for fixed +5V systems due to zero external components, while ADM6713ANZ-46ARZ provides a validated pin-compatible upgrade path with improved threshold stability.

Availability

MAX702CPA is available at Aetrix Electronics and suitable for industrial PLC controllers, embedded data loggers, medical handheld diagnostics, and point-of-sale terminal power management requiring stable component supply and long-term obsolescence support.

Supply support for MAX702CPA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power-management ICs for industrial, computing, and communications applications.

The MAX700/MAX701/MAX702 family was engineered specifically for cost-sensitive, high-reliability microprocessor power supervision-delivering guaranteed reset timing, minimal external parts, and robust brownout detection in compact packages.

FAQ

What is the reset threshold voltage of the MAX702CPA?

The MAX702CPA features a factory-trimmed reset threshold of 4.65V, with a guaranteed tolerance of ±150mV over the full 0°C to +70°C operating range. This fixed threshold eliminates the need for external resistors and ensures consistent power-on reset behavior in +5V systems. The MAX702CPA asserts RESET when VCC falls below this level and holds it for a minimum of 200ms after VCC recovers above threshold.

Does the MAX702CPA require external components for basic operation?

No, the MAX702CPA requires no external components for core supervision functionality. Its 4.65V threshold is internally trimmed, the MR input includes a 5µA internal pullup, and the open-drain RESET output only needs a single external pullup resistor to interface with most µP reset inputs. This makes the MAX702CPA ideal for space- and cost-constrained designs where simplicity and reliability are critical.

What is the minimum VCC voltage at which MAX702CPA guarantees correct RESET output state?

The MAX702CPA guarantees correct RESET output state (i.e., logically valid low/high assertion) down to VCC = 1.0V, as confirmed in Figure 4 of the datasheet. This capability enables reliable brownout detection well below typical logic thresholds and supports safe shutdown sequencing in battery-powered or unstable supply environments where VCC may sag transiently.

Is the MAX702CPA pin-compatible with other devices in the MAX700 family?

No-the MAX702CPA is not pin-compatible with the MAX700 or MAX701. While all three share the same 8-pin PDIP outline, the MAX702CPA uses only pins 1 (MR), 2 (GND), 3 (RESET), and 4 (VCC); pins 5–8 are N.C. In contrast, MAX700 and MAX701 assign functional signals (e.g., RESET, CTL, SENSE, HYST) to those pins. Substituting them without board redesign will result in undefined or nonfunctional behavior.

What is the RESET pulse width specification for MAX702CPA?

The MAX702CPA guarantees a minimum RESET pulse width of 200ms during power-up, power-down, and low-voltage conditions, with a typical value of 350ms and maximum of 500ms. This timing is internally generated and independent of external capacitance, ensuring µP and peripheral initialization completes reliably-even under marginal VCC ramp rates or noisy supply conditions.